流体機械における混相流

その研究状況と課題

抄録

This paper presents a review on the current researches for the multiphase flow problems in turbomachinery, except for those caused by cavitation. Air-water two-phase flows are discussed from the aspects to define pump head and related characteristics, to predict the performance change using one-dimensional two-fluids models, to deepen our understanding of scale effect and unsteady flow phenomena, and to precisely simulate multidimensional flows inside the rotating impellers using turbulent and two fluids models. Solid-water two-phase flow problems are described from the viewpoints of precise prediction of erosion due to impingement of the solid particles entrained.